1 /* Definitions of target machine for GNU compiler. "embedded" 68XXX. 2 This is meant to be included after m68k.h. 3 Copyright (C) 1994-2018 Free Software Foundation, Inc. */ 4 5 /* Override the SVR4 ABI for this target. */ 6 7 #define PTRDIFF_TYPE "long int" 8 #define SIZE_TYPE "long unsigned int" 9 10 /* In order for bitfields to work on a 68000, or with -mnobitfield, we must 11 define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY. 12 Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems, 13 so we define PCC_BITFIELD_TYPE_MATTERS. */ 14 #define PCC_BITFIELD_TYPE_MATTERS 1 15 16 /* Don't default to pcc-struct-return, so that we can return small structures 17 and unions in registers, which is slightly more efficient. */ 18 #define DEFAULT_PCC_STRUCT_RETURN 0 19 20 #undef FUNCTION_VALUE 21 #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE)) 22 23 #undef LIBCALL_VALUE 24 #define LIBCALL_VALUE(MODE) \ 25 m68k_libcall_value (MODE) 26 27 #undef FUNCTION_VALUE_REGNO_P 28 #define FUNCTION_VALUE_REGNO_P(N) \ 29 ((N) == D0_REG || (TARGET_68881 && (N) == FP0_REG)) 30 31 #undef NEEDS_UNTYPED_CALL 32 #define NEEDS_UNTYPED_CALL 1 33 34 /* Target OS builtins. */ 35 #define TARGET_OS_CPP_BUILTINS() \ 36 do \ 37 { \ 38 builtin_define ("__embedded__"); \ 39 } \ 40 while (0) 41 42 /* Override the default LIB_SPEC from gcc.c. We don't currently support 43 profiling, or libg.a. */ 44 45 #undef LIB_SPEC 46 #define LIB_SPEC "-lc" 47 48 /* Make this be null, since we want the crt0.o to come from the linker 49 script */ 50 51 #undef STARTFILE_SPEC 52 #define STARTFILE_SPEC "" 53